Stamp



FIG. 1 is a top and side perspective view of a stamp, showing my new design;

FIG. 2 is a side elevational view thereof the other side being a mirror image;

FIG. 3 is a side elevational view thereof; taken from the right of FIG. 2 the other side being a mirror image;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a stamp, as shown and described. 